#Sudoku-Solver This is a recursive Sudoku solver that can solve any valid Sudoku puzzle in less than a second

Dependencies:

import os
import numpy as np
from selenium import webdriver
from tkinter import *
from tkinter import ttk

File Overview:

Big picture overview of all the files:
grid.py: Contains the grid and does most of the solving
solver.py: Contains the GUI and initializes the grid, main run method RUN THIS to access the solver
web.py: Scrapes a puzzle from online

Controls:

Clear: Clears the puzzle
Solve: Solves the puzzle
Web Sudoku: Loads a random puzzle from websudoku.com
Input: Simply input numbers into each cell in the Grid
Output: The Grid outputs the solution, with given numbers as black and all other numbers as red. If a solution is not found or the puzzle is invalid, the Grid will append all non-numeric cells with a red X. Please note that if there are multiple solutions to a puzzle, the program will only output one.

Error handling and known Errors:

1. You MUST have a google chrome driver as an environment variable named, by default CHROME. If you wish to have a driver with a different name, change line 12 in web.py to:
         driver_name = '<driver name>'
   Note if you do not do this, there will be an error
2. Invalid puzzles or inputs are handled by printing red X's

Future plans

1. Determine number of solutions to a puzzle
2. Make sudoku puzzles with the program